tovero VS xi-editor

I forgot to add, at the time in 2014 I was working on this project

https://news.ycombinator.com/item?id=32491982

which lead to this one:

https://github.com/JMC-design/tovero

As I was taking a break from writing that "wall of text" last night, I finished my "Homer's Donut" shape, a 3D torus with a 0 - 360 degree arc to connect pipe-like shapes. My pipe-routing code is almost finished as of this morning.

My parents also taught me to "pick myself up, dust myself off, and start all over again." Peter Tosh too. So I guess another trite quote, "It's hard to innovate when you keep receiving 'being hit over the head' lessons."

> It looks like your e-mail was the victim of my paternity leave

10 years is generous paternity leave. :) Seriously though, no hard feelings, separating the wheat from the free software chaff takes time--ask me how I know.

> interactive editor like mged with lisp wrapping BRL-CAD's libged editing library

That interests me!

IME, I have found S-expressions to be an elegant, succinct way of expressing geometric models (especially in the F-rep domain):

https://github.com/JMC-design/tovero/blob/master/examples/ro...

I wrote a referencing counting C++ reader/writer for S-expression models like that directly into Open Inventor, in place of the IV (VRML) format, avoiding the use of CL.

Emacs has a C FFI, IIRC, so it should be possible to develop a S-exp formatted BRL-CAD model in elisp, with the right C shims--giving a live-coding, REPL experience for building BRL-CAD models.

Thanks for your work on BRL-CAD!

Was confused until I realised I'd confused Zed, with Xi[1] which is also rust based, and which incidentally has a frontend called "Xim"..

Also there's a wiki-editor (like Tomboy[2]) called "Zim"[3].

[1] https://github.com/xi-editor/xi-editor

Project site linked from the GitHub[0] is https://xi-editor.io. Linked doc is a mirror of this[1], which was afaik originally written by Raph Linus.

[0]: https://github.com/xi-editor/xi-editor

[1]: https://xi-editor.io/docs/rope_science_01.html

> thing that gets deleted when you hit backspace

Is there a canonical source for this part, by the way? Xi copied the logic from Android[1] (as per the issue you linked downthread), and I vaguely remember that CLDR had something to say about this too, but I don’t know if there’s any sort of consensus here that’s actually written down anywhere.

[1] https://github.com/xi-editor/xi-editor/pull/837

This is pretty much how copy-on-write ropes work. Check out xi-rope, Ropey or crop, they're all built using B-trees and implement the behavior you described.

Helix is awesome, though once Lapce (spiritual successor to Xi editor) gets the Helix/Kakoune editing model, I may have to jump ship

Home (xi-editor.io)

Maybe take a look at the Xi editor (https://xi-editor.io/) (written in rust I think) that uses a client server architecture.

Have a look at what Lapce uses. The editor is coming along nicely, and iirc, they use the Xi editor as a plug-in.

Raph Levien posted a retrospective about using CRDT’s for collaborative editing in xi-editor here [1]. His conclusion is

“I come to the conclusion that the CRDT is not pulling its (considerable) weight. When I think about a future evolution of xi-editor, I see a much brighter future with a simpler, largely synchronous model, that still of course has enough revision tracking to get good results with asynchronous peers like the language server.”

[1]https://github.com/xi-editor/xi-editor/issues/1187#issuecomm...